For a richer flavor, consider using smoked paprika in the egg mixture. Add a dollop of sour cream or a slice of avocado for extra creaminess. If you prefer a spicier kick, use a hotter salsa or add a pinch of cayenne pepper to the egg mixture. For a vegetarian option, substitute the ham with black beans or sautéed mushrooms. To make ahead, assemble the sliders and wrap them individually in foil. Reheat in a preheated oven at 350°F (175°C) for about 10-15 minutes, or until heated through.